90 Skidoo Formula 467 Lt Exhaust Muffler G36 on 2040-parts.com

Hennessey Cadillac Escalade gets 557 hp

The 2015 Cadillac Escalade is about as American as an SUV can be. We didn't find the 420-hp, 6.2-liter V8 lacking in any way, but if you want something with a little more grunt, Hennessey Performance Engineering and its HPE550 upgrade should help. Hennessey says the HPE550 Escalade package bumps output to 557 hp and 542 lb-ft of torque with the help of a belt-driven supercharger producing 6 psi.

BMW M5 hits the beach at Pendine Sands (video)

BMW M5 playing on Pendine Sands BMW has taken the new M5 to Pendine Sands in Wales to kick up some sand and promote the 2012 London Olympics. Regular Top Gear watchers will be all too aware that Pendine Sands in Wales offers some spectacular driving prospects. Or at least it does if you have a couple of willing chaps with spades and a Range Rover ready to dig you out when you inevitably get stuck.

Sacramento, Salt Lake City, Los Angeles top road frustration study

Weather, crashes, traffic and attitude--these are the things that make our commutes unbearable. Now, the RoadIntel.com Web site has ranked cities based on its "road frustration index." The index is based on how weather affects the roads, the amount of traffic, the number of crashes and driver sentiment, which is calculated by searching for keywords such as "traffic jam" and "stuck" on Twitter. On the site, you can look at cities ranked day by day and even hour by hour.